You fly over mountain tops and through caves dodging enemy space ships and missiles fired from the ground.
Cosmic Avenger is a 1981 arcade game developed and published by Universal.
Cosmic Avenger was ported to the ColecoVision video game console. Wes Hupp holds the official record for this game with 117,290 points on November 17, 1982.
Mark Bussler from Classic Game Room notes that Cosmic Avenger is the first continuous horizontal side-scrolling space shooter (though it is actually predated by Konami's Scramble). Cosmic Avenger looks quite well and provides a rewarding challenge to the player.